Keil forum what will happen if 8051 encounts a wrong instruction?

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what will happen if 8051 encounts a wrong instruction?

stoic li over 23 years ago

as the title.

0 Mark Odell over 23 years ago

Continue? There is no illegal opcode trap on an 8051. In fact, there are no traps on an 8051.

- Mark
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0 Andrew Neil over 23 years ago in reply to Mark Odell

Some variants use the 0xEA (IIRC) instruction as a "Trap" - eg, the Triscend E5 uses it as a software breakpoint.
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0 Andy Neil over 23 years ago in reply to Andrew Neil

My memory was incorrect: the instruction is 0xA5.
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0 Marques Girardelli over 23 years ago in reply to Andy Neil

The only 'wrong' instruction is the 0xA5 instruction, which has different behaviors on different processors. Check out http://www.8052.com/51und.phtml for more information.
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0 stoic li over 23 years ago in reply to Marques Girardelli

Thanks!

Stoic
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